3v4l.org

run code in 300+ PHP versions simultaneously
<?php mb_internal_encoding('UTF-8'); echo 'Subject: ', mb_encode_mimeheader('𝕄', 'UTF-8', 'B');

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)
8.3.60.0080.00818.16
8.3.50.0150.00617.68
8.3.40.0150.00018.73
8.3.30.0030.01018.78
8.3.20.0070.00020.13
8.3.10.0000.00821.65
8.3.00.0000.00820.71
8.2.180.0140.00718.04
8.2.170.0120.00322.96
8.2.160.0100.00319.33
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0040.00426.16
8.2.120.0060.00319.54
8.2.110.0000.01121.00
8.2.100.0070.01017.72
8.2.90.0040.00419.18
8.2.80.0030.00617.97
8.2.70.0060.00317.50
8.2.60.0040.00417.80
8.2.50.0100.00018.07
8.2.40.0050.00517.87
8.2.30.0030.00718.12
8.2.20.0040.00417.51
8.2.10.0030.00617.83
8.2.00.0040.00417.55
8.1.280.0140.01125.92
8.1.270.0060.00320.61
8.1.260.0060.00326.35
8.1.250.0040.00428.09
8.1.240.0100.00022.11
8.1.230.0030.00819.07
8.1.220.0040.00417.74
8.1.210.0030.00618.77
8.1.200.0000.00917.00
8.1.190.0040.00417.00
8.1.180.0000.00818.10
8.1.170.0060.00320.27
8.1.160.0040.00422.02
8.1.150.0040.00418.81
8.1.140.0000.00817.48
8.1.130.0030.00317.76
8.1.120.0000.00717.33
8.1.110.0050.00217.39
8.1.100.0000.00717.34
8.1.90.0030.00417.41
8.1.80.0040.00417.42
8.1.70.0000.00817.28
8.1.60.0000.00817.45
8.1.50.0000.00817.48
8.1.40.0000.00717.39
8.1.30.0060.00317.64
8.1.20.0040.00417.61
8.1.10.0030.00617.45
8.1.00.0000.00817.32
8.0.300.0050.00318.77
8.0.290.0030.00316.63
8.0.280.0050.00318.43
8.0.270.0070.00017.37
8.0.260.0000.00717.25
8.0.250.0030.00316.92
8.0.240.0070.00016.98
8.0.230.0050.00316.91
8.0.220.0050.00316.83
8.0.210.0030.00316.71
8.0.200.0000.00616.84
8.0.190.0070.00016.86
8.0.180.0030.00616.74
8.0.170.0050.00216.75
8.0.160.0000.00716.86
8.0.150.0000.00716.66
8.0.140.0000.00716.82
8.0.130.0030.00313.19
8.0.120.0030.00616.73
8.0.110.0000.00716.85
8.0.100.0000.00716.61
8.0.90.0050.00316.64
8.0.80.0110.01116.76
8.0.70.0050.00316.72
8.0.60.0040.00416.88
8.0.50.0050.00316.82
8.0.30.0100.01116.97
8.0.20.0110.00717.40
8.0.10.0050.00316.90
8.0.00.0030.01416.71
7.4.330.0000.00515.04
7.4.320.0000.00716.54
7.4.300.0030.00316.47
7.4.290.0030.00716.39
7.4.280.0000.00816.50
7.4.270.0080.00016.44
7.4.260.0080.00016.36
7.4.250.0000.00716.48
7.4.240.0040.00316.48
7.4.230.0000.00716.24
7.4.220.0070.01116.39
7.4.210.0090.00716.48
7.4.200.0070.00016.32
7.4.160.0150.00016.23
7.4.150.0100.00717.40
7.4.140.0110.00717.86
7.4.130.0030.01316.37
7.4.120.0080.00916.34
7.4.110.0090.01416.24
7.4.100.0100.01316.38
7.4.90.0000.01716.36
7.4.80.0070.01019.39
7.4.70.0120.00616.55
7.4.60.0100.00616.43
7.4.50.0080.00016.31
7.4.40.0130.00716.30
7.4.30.0130.00616.48
7.4.00.0090.00415.04
7.3.330.0060.00013.12
7.3.320.0020.00213.07
7.3.310.0000.00716.08
7.3.300.0000.00616.18
7.3.290.0000.00616.19
7.3.280.0090.00816.17
7.3.270.0150.00817.40
7.3.260.0170.00616.08
7.3.250.0100.00816.36
7.3.240.0100.00616.51
7.3.230.0130.00316.39
7.3.210.0030.01916.46
7.3.200.0100.01019.39
7.3.190.0060.00916.39
7.3.180.0040.01216.41
7.3.170.0120.00816.27
7.3.160.0170.00416.30
7.2.330.0070.01016.43
7.2.320.0030.01316.36
7.2.310.0110.00616.39
7.2.300.0060.00916.44
7.2.290.0070.01016.39
7.2.60.0070.00716.93
7.2.00.0030.00919.26
7.1.200.0090.00615.80
7.1.100.0030.01018.00
7.1.70.0050.00316.97
7.1.60.0150.00719.46
7.1.50.0270.01034.76
7.1.00.0030.07022.36
7.0.200.0070.00716.82
7.0.140.0030.05722.05
7.0.60.0070.07320.00
7.0.50.0130.04317.79
7.0.40.0000.09320.12
7.0.30.0500.07720.02
7.0.20.0370.07720.17
7.0.10.0270.07020.16
7.0.00.0100.08320.17
5.6.280.0070.07020.77
5.6.210.0130.08020.70
5.6.200.0130.04018.18
5.6.190.0070.07720.42
5.6.180.0070.08320.35
5.6.170.0230.05020.54
5.6.160.0130.08020.49
5.6.150.0070.06018.04
5.6.140.0030.07318.10
5.6.130.0100.07318.15
5.6.120.0170.07321.05
5.6.110.0000.04721.13
5.6.100.0300.07321.00
5.6.90.0030.04020.94
5.6.80.0130.07020.50
5.6.70.4100.04020.27
5.5.350.0070.08020.38
5.5.340.0070.05317.96
5.5.330.0030.05720.20
5.5.320.0170.04720.50
5.5.310.0270.05020.29
5.5.300.0030.07317.96
5.5.290.0030.04017.92
5.5.280.0170.07020.68
5.5.270.0100.07720.95
5.5.260.0070.08020.66
5.5.250.0200.07020.58
5.5.240.0030.08020.14
5.4.450.0500.07319.12
5.4.440.0670.06719.49
5.4.430.0100.07019.52
5.4.420.0070.05719.31
5.4.410.0100.05718.67
5.4.400.0270.04318.77
5.4.390.0670.06718.63
5.4.380.0300.07718.60
5.4.370.0600.07018.69
5.4.360.0100.06718.52
5.4.350.0070.06718.73
5.4.340.0370.06718.57
5.4.320.0070.07318.58
5.4.310.0600.06018.58
5.4.300.0130.05718.75
5.4.290.0230.05318.72
5.4.280.0600.05718.49
5.4.270.0230.05018.68
5.4.260.0400.05718.71
5.4.250.0200.05318.75
5.4.240.0500.05718.66
5.4.230.0100.06018.58
5.4.220.0170.07718.57
5.4.210.0470.05318.72
5.4.200.0230.05716.48
5.4.190.0500.07018.68
5.4.180.0270.06718.70
5.4.170.0130.05718.72
5.4.160.0500.04718.49
5.4.150.0200.07718.54
5.4.140.0200.05316.15
5.4.130.0270.04016.30
5.4.120.0330.05716.34
5.4.110.0130.05016.14
5.4.100.0200.05016.03
5.4.90.0400.05716.24
5.4.80.0270.04716.20
5.4.70.0400.05016.14
5.4.60.0200.05016.17
5.4.50.0430.05316.27
5.4.40.0200.04716.28
5.4.30.0170.04716.09
5.4.20.0400.05316.30
5.4.10.0100.05316.05
5.4.00.0470.05015.76
5.3.290.0170.05714.73
5.3.280.0230.05014.59
5.3.270.0400.05714.51
5.3.260.0170.05314.64
5.3.250.0500.04314.60
5.3.240.0100.06014.55
5.3.230.0230.05714.50
5.3.220.0430.05014.46
5.3.210.0070.06714.54
5.3.200.0130.05714.65
5.3.190.0130.05714.59
5.3.180.0200.07014.65
5.3.170.0170.05014.56
5.3.160.0530.05014.50
5.3.150.0130.05314.50
5.3.140.0130.05314.54
5.3.130.0230.05314.47
5.3.120.0230.04714.51
5.3.110.0330.04314.64
5.3.100.0530.06014.04
5.3.90.0330.03714.07
5.3.80.0270.04313.94
5.3.70.0330.05314.04
5.3.60.0100.05713.98
5.3.50.0370.05013.93
5.3.40.0230.04713.87
5.3.30.0130.05313.99
5.3.20.0470.04313.64
5.3.10.0100.06013.75
5.3.00.0430.04313.60
5.2.170.0100.04311.05
5.2.160.0070.04711.12
5.2.150.0400.03711.14
5.2.140.0200.04011.11
5.2.130.0170.03711.08
5.2.120.0400.04011.08
5.2.110.0100.04311.05
5.2.100.0130.04311.04
5.2.90.0530.05711.13
5.2.80.0230.03311.07
5.2.70.0200.05311.14
5.2.60.0630.05011.01
5.2.50.0100.04311.07
5.2.40.0130.04011.02
5.2.30.0200.03310.88
5.2.20.0130.03710.93
5.2.10.0500.05310.95
5.2.00.0070.04310.70
5.1.60.0100.0379.95
5.1.50.0100.03710.11
5.1.40.0070.04010.02
5.1.30.0670.04310.32
5.1.20.0130.05310.46
5.1.10.0130.05010.09
5.1.00.0170.04710.20
5.0.50.0070.0308.55
5.0.40.0030.0438.43
5.0.30.0030.0508.19
5.0.20.0530.0338.21
5.0.10.0000.0338.30
5.0.00.0070.0438.23
4.4.90.0030.0305.91
4.4.80.0030.0235.88
4.4.70.0100.0205.93
4.4.60.0070.0235.89
4.4.50.0300.0275.92
4.4.40.0030.0375.88
4.4.30.0070.0205.88
4.4.20.0100.0205.97
4.4.10.0070.0205.97
4.4.00.0030.0375.91
4.3.110.0030.0305.84
4.3.100.0070.0235.85
4.3.90.0030.0235.87
4.3.80.0030.0405.91
4.3.70.0100.0175.81
4.3.60.0400.0175.80
4.3.50.0130.0235.77
4.3.40.0000.0405.74
4.3.30.0030.0304.58
4.3.20.0030.0234.56
4.3.10.0000.0274.50
4.3.00.0070.0276.97

preferences:
53.24 ms | 400 KiB | 5 Q